Computer-Generated Chess Problem 03471

Now, here we have a 'KRBP vs kr' mate in 4 chess problem generated by the program, Chesthetica, using the approach known as the DSNS from the sub-field of AI, computational creativity. Depending on the type and complexity of the problem desired, a single instance of Chesthetica running on a desktop computer can probably generate anywhere between one and ten problems per hour.

1k6/1P5B/2K5/8/8/8/4r3/7R w - - 0 1
White to Play and Mate in 4
Chesthetica v12.40 (Selangor, Malaysia)
Generated on 29 Sep 2021 at 10:13:50 PMSolvability Estimate = Moderate
Most changes to Chesthetica that result in a slightly higher version number are simply to improve the interface or fix a minor bug, by the way. Get a glimpse into the 'mind' of a computer composer. Why not time yourself how long it took you to solve this? Solving chess puzzles like this can also help improve your game.
A Similar Chess Problem by Chesthetica: 03329
Solution